What an amazing revellation! As a hospital porter, working in the same environment as Dr Gibson, I'll keep a lookout for ghosts myself. As it happens, there's rumours that the Clinical Decisions Unit of the John Radcliffe Hospital is haunted. A few months ago a nurse ran out of there screaming. She told me she saw a spectreal figure in there. I've had a look myself, but so far I've not seen anything. But I'll keep looking.